add calculate CRC function

2024-12-20 16:56:05 +08:00
parent 2ff2916ed6
commit 21a5a2e783
2 changed files with 16 additions and 0 deletions
--- a/inc/rs485.h
+++ b/inc/rs485.h
@@ -12,6 +12,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/types.h>

 #define RS485_RCU            RCU_USART0
 #define RS485_GPIO_RCU       RCU_GPIOA